US3681574A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for serially entering information into a shift register
Assignee: Avery Weigh Tronix Ltd
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Filing: 1970-03-30
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Granted: 1972-08-01
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Expires: 1990-03-30
Abstract
Abstract A circuit for serially entering information into a shift register which avoids the need to re-set the register with a previous or subsequent separate re-setting operation, comprising a sensing circuit responsive to each of a sequence of operations of an encoder, and a timing switch which is under the control of the sensing circuit so as to be operative on a operation of the encoder to clear from the shift register information related to a next preceding operation of the encoder after a pre-determined time interval has elapsed from this preceding operation.
Inventors
- 👤 William Ernest Caulkin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:15
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/26; H04M1/27; H04M1/272; H04M1/2725
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
143 words
Apparatus for serially entering digit information into a shift register comprising an encoder connected to feed said information into the shift register in a sequence of operations, a sensing circuit means operative to sense each of said sequence of digit encoding operations of the encoder, and a timing circuit under the control of the sensing circuit and operative on an operation of the encoder to clear from the shift register information related to a last preceding and earlier operations of the encoder if a prEdetermined time interval has elapsed from said last preceding operation of the encoder, said encoder being a manually operated decimal-binary encoder, and the sensing circuit and timing circuit cooperating to provide decade upgrading of the previously entered information in the register only following further manual operation of the encoder within the pre-determined time interval from the last preceding operation.
Claim 2
Dependent Claim
143 words
Apparatus for serially entering digit information into a shift register comprising an encoder connected to feed said information into the shift register in a sequence of operations, a sensing circuit means operative to sense each of said sequence of digit encoding operations of the encoder, and a timing circuit under the control of the sensing circuit and operative on an operation of the encoder to clear from the shift register information related to a last preceding and earlier operations of the encoder if a prEdetermined time interval has elapsed from said last preceding operation of the encoder, said encoder being a manually operated decimal-binary encoder, and the sensing circuit and timing circuit cooperating to provide decade upgrading of the previously entered information in the register only following further manual operation of the encoder within the pre-determined time interval from the last preceding operation.
Claim 3
Dependent Claim
32 words
Apparatus according to claim 1 characterized by a gate operative to block passage of a clearing pulse to the register for a predetermined time interval immediately following an operation of the encoder.
Claim 4
Dependent Claim
29 words
Apparatus according to claim 3 characterized in that said gate is controlled by a trigger circuit in turn controlled by the voltage of a condenser in the timing circuit.
Claim 5
Dependent Claim
73 words
Apparatus according to claim 1 characterized in that manual operation of the encoder effects entry of a digit information into a store with accompanying clearance or non-clearance of the register of previously entered information according to the elapsed time interval, whereas cessation of said manual operation effects decade upgrading of said previously entered information if this has not been cleared and also transmission of the further information from the store into the register.
Claim 6
Dependent Claim
91 words
Apparatus according to claim 4 wherein the encoder is push button operated, characterized by circuit means responsive to the leading edge of a pulsed wave derived by the sensing circuit from operation of a push button to provide a clearing signal to the register, and by further circuit means responsive to a trailing edge of said pulsed wave corresponding to cessation of operation of the push button to provide a shift pulse to the register to effect said upgrading and transmission of the information from the store to the shift register.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |